Dont know if there was a previous question to this.
but why cant you access bios and why do you want to access bios.
if it to reset password I have software thats boots up and can change or wipe passwords ,even with no harddrive.and also reset bios to factory standard.

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my friend the new laptop has no jumper anymore on the board, and u cannot reset the bios this easily, some laptops u still can do that by disconnecting the bios battery and connect it after some minute, but if this doesnot work donot destroy ur laptop.

If I'm understanding your question correctly, you need to reboot the system hit the F2 key to enter the BIOS setup - find the password page (can't remember what Dell calls it) and disable the password.

If you open the tower itself there is a battery on the motherboard that if removed will reset your bios password. just remove the battery wait about 5 minutes and then put the battery back in and power on this should take care of your problem.